Java壓縮/解壓ZIP

使用ant.jar中的org.apache.tools.zip.*

2. import java.io.BufferedInputStream;
3. import java.io.File;
4. import java.io.FileInputStream;
5. import java.io.FileOutputStream;
6. import java.io.InputStream;
7. import java.util.Enumeration;
9. import org.apache.tools.zip.ZipEntry;
10. import org.apache.tools.zip.ZipFile;
11. import org.apache.tools.zip.ZipOutputStream;
13. public class ZipUtil {
15. public boolean zip(String zipFilePath,String[] fromZipFileArray) throws Exception
16. {
17. File toZipFile = new File(zipFilePath);
18. if (!toZipFile.exists())
19. {
20. toZipFile.createNewFile();
21. }
22. ZipOutputStream out = new ZipOutputStream(new FileOutputStream(toZipFile));
23. for (String str : fromZipFileArray)
24. {
25. this.writeToZip(out, new File(str), "");
26. }
27. out.close();
28. return true;
29. }
31. private void writeToZip(ZipOutputStream out,File fromZipFile,String base) throws Exception
32. {
33. if (fromZipFile.isDirectory())
34. {
35. for (File file : fromZipFile.listFiles())
36. {
37. this.writeToZip(out, file, base + fromZipFile.getName() + File.separator);
38. }
39. }
40. else
41. {
42. //add this file
43. this.addFileToZip(out,fromZipFile,base + fromZipFile.getName());
44. }
45. }
47. private void addFileToZip(ZipOutputStream out,File file,String base) throws Exception
48. {
49. byte[] buff = new byte[1024];
50. int bytesRead = -1;
51. ZipEntry entry = new ZipEntry(base);
52. out.putNextEntry(entry);
53. InputStream in = new BufferedInputStream(new FileInputStream(file));
54. while (-1 != (bytesRead = in.read(buff, 0, buff.length))) {
55. out.write(buff, 0, bytesRead);
56. }
57. in.close();
58. out.flush();
59. }
61. public void unzip(String zipFilePath,String unzipFilePath) throws Exception
62. {
63. ZipFile zipfile = new ZipFile(zipFilePath,"GB2312");
64. Enumeration enu = zipfile.getEntries();
65. while(enu.hasMoreElements())
66. {
67. ZipEntry entry = (ZipEntry)enu.nextElement();
68. this.writeToDir(zipfile, entry, new File(unzipFilePath + File.separator + entry.getName()));
70. }
71. }
73. private void writeToDir(ZipFile zip, ZipEntry entry, File toFile) throws Exception
74. {
75. if (!entry.isDirectory()) {
76. File file = toFile.getParentFile();
77. if (!file.exists())
78. {
79. file.mkdirs();
80. }
81. FileOutputStream fos = new FileOutputStream(toFile);
82. byte[] buffer = new byte[1024];
83. InputStream is = zip.getInputStream(entry);
84. int len;
85. while((len = is.read(buffer,0,buffer.length)) != -1)
86. {
87. fos.write(buffer,0,len);
88. }
89. fos.close();
90. }
91. }
92. }

[java]

1. new ZipUtil().zip("D:\\ziptest.zip", new String[]{"D:\\ziptest"});
2. new ZipUtil().unzip("D:\\ziptest.zip", "E:\\");